SO(3) family symmetry and axions

Mario Reig, José W. F. Valle, Frank Wilczek
2018 Physical Review D  
Motivated by the idea of comprehensive unification, we study a gauged SO(3) flavor extension of the extended Standard Model, including right-handed neutrinos and a Peccei-Quinn symmetry with simple charge assignments. The model accommodates the observed fermion masses and mixings and yields a characteristic, successful relation among them. The Peccei-Quinn symmetry is an essential ingredient.
doi:10.1103/physrevd.98.095008 fatcat:iaq5vocm55d2vez6hmk2gsobya